McQuay AGZ 034BS, AGZ 034BM, AGZ 010BM Operation Manual
Installation, Operation and Maintenance Manual
IOMM AGZB1
Air-Cooled Scroll Compressor Water Chillers
AGZ 010BS – AGZ 034BS, Packaged Chiller
AGZ 010BM – AGZ 034BM, Remote Evaporator
10 to 34 Tons, 35 to 120 kW
R-22, R-407C
60 Hertz
Software Version AGZSU0102D
Group: Chiller
Part Number: 331975001
Effective: October 2007
Supersedes: New
Table of Contents
Introduction ....................................... 3
General Description...................................3
Inspection ..................................................3
Installation .................................................3
Handling ....................................................3
Location.....................................................4
Service Access...........................................4
Vibration Isolators.....................................6
Chilled Water System ................................6
Water Connections ....................................9
Refrigerant Charge ....................................9
Unit Component Location .........................9
Glycol Solutions ......................................10
Evaporator Water Flow and Pressure Drop10
R-407C Units.................................... 12
Control Layout and Operation ...... 14
Control Center .........................................14
Start-up and Shutdown................... 14
Pre Start-up..............................................14
Start-up ....................................................14
Sequence of Operation ............................15
Physical Data.................................... 16
AGZ-BS, R-22/R-407C ...........................16
AGZ-BM, R-22/R-407C..........................18
Electrical Data ................................. 20
Field Wiring.............................................20
R-22 .........................................................20
R-407C ....................................................23
Dimensions & Weights .................... 28
Remote Evaporators ................................30
ACZ/AGZ Dimensions and Weights .......31
System Maintenance........................ 32
General ....................................................32
Lubrication.............................................. 32
Electrical Terminals................................ 32
Condensers.............................................. 32
Refrigerant Sight glass............................ 32
Standard MicroTech II Controller.33
Table of Contents.................................... 33
Overview................................................. 34
General Description ................................ 34
Setpoint Security..................................... 38
Equipment Protection Alarms................. 38
Control Functions and Definitions ......... 39
Unit Enable ............................................. 41
Unit Mode ............................................... 41
Power Up Start Delay ............................. 42
Ice Mode Start Delay .............................. 42
Unit State ................................................ 42
Evaporator Water Pump State Control.... 43
Condenser Fans....................................... 44
Low OAT Start........................................ 44
Circuit Capacity Overrides ..................... 44
Maximum LWT Rate .............................. 45
Low Ambient Lockout ............................ 45
Compressor Control................................ 45
Using the Controller ............................... 48
Menu Screens.......................................... 49
BAS Interface...................................61
Service...............................................62
Thermostatic Expansion Valve ............... 62
Filter-Driers ............................................ 62
Liquid Line Solenoid .............................. 62
Optional Controls.................................... 63
Troubleshooting Chart ............................ 66
©2007 McQuay International. Illustrations and data cover the McQuay International product at the time of publication and we
reserve the right to make changes in design and construction at anytime without notice. ™® The following are trademarks or
registered trademarks of their respective companies: BACnet from ASHRAE; LONM
logo are managed, granted and used by LONM
from Copeland Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech II, Open
Choices, and SpeedTrol from McQuay International.
2 AGZ 010B through 034B IOMM AGZB1
ARK
ARK
International under a license granted by Echelon Corporation; Compliant Scroll
, LonTalk, LONW
ORKS
, and the LONM
ARK
Introduction
General Description
McQuay air-cooled water chillers are complete, self-contained automatic refrigerating units.
Every unit is completely assembled, factory wired, charged, and tested. Each unit consists of
air-cooled condensers, Copeland Compliant Scroll hermetic compressor, brazed plate-toplate evaporator, and complete refrigerant piping. Liquid line components include sightglass/moisture indicator, solenoid valve, and thermal expansion valve. Other features include
a compressor heater, and evaporator heater for chilled water freeze protection.
The electrical control center includes all equipment protection and operating controls
necessary for automatic operation. Condenser fan motors are three-phase (except single-phase
on No. 1 fan with SpeedTrol option) and started by their own contactors and have inherent
overload protection. Each compressor has solid-state motor protection for inherent thermal
overload protection except Model AGZ 010 that has internal line breakage.
Software Version
This manual is based on software version AGZSU0102D. The software version can be
displayed by pressing the Enter and Menu keys simultaneously. Exit by pressing Menu.
Inspection
Check all items carefully against the bill of lading. Inspect all units for damage upon arrival.
Report shipping damage and file a claim with the carrier. Check the unit nameplate before
unloading to be sure it agrees with the power supply available. Units are shipped FOB factory
and McQuay is not responsible for physical damage after unit leaves the factory.
Note: Unit shipping and operating weights are listed on pages 16 and 17.
Installation
Note: Installation must be performed by trained, experienced personnel who are
familiar with local codes and regulations, especially concerning refrigerant release
to the atmosphere.
!
WARNING
Sharp edges and coil surfaces can cause personal injury. Avoid contact with them.
Handling
Be careful to avoid rough handling of the unit. Do not push or pull the unit from anything
other than the base. Block the pushing vehicle away from the unit to prevent damage to the
sheet-metal cabinet and end frame (see Figure 1).
To lift the unit, lifting slots are provided in the base of the unit. Arrange spreader bars and
cables to prevent damage to the condenser coils or cabinet (see Figure 2).
H
AZARD IDENTIFICATION INFORMATION
!
WARNING
Warnings indicate potentially hazardous situations, which can result in property damage, severe
personal injury, or death if not avoided.
!
CAUTION
Cautions indicate potentially hazardous situations, which can result in personal injury or
IOMM AGZB1 AGZ 010B through 034B 3
equipment damage if not avoided.
BLOCKING REQUIRED
ACROSS FULL WIDTH
SPREADER BAR (2)
PIPE SLUNG THRU
OPENINGS IN LEGS (2)
Figure 1, Suggested Pushing Arrangement
Figure 2, Suggested Lifting Arrangement
NOTE:: The fork lift slots can be used for
lifting by inserting sufficiently strong pipe
through them as shown in Figure 2.
Use the outboard slots on three-fan units
and the only two on two-fan units.
Location
Unit Placement
AGZ units are for outdoor applications and can be mounted on a roof or at ground level.
Set units on a solid and level foundation. For roof-mounted applications, install the unit on
a steel channel or I-beam frame to support the unit above the roof. For ground level
applications, install the unit on a substantial base that will not settle. A one-piece concrete
slab with footings extended below the frost line is recommended. Be sure the foundation is
level (within 1/2” [13 mm] over its length and width). The foundation must support the
operating weights listed in the Physical Data Tables on pages 16 and 17. It is recommended
that the unit be raised a few inches with a suitable support, located at least under the
mounting locations, to allow water to drain from under the unit and to facilitate cleaning
under it.
Since its operation is affected by wind, the unit should be located so that its length is
parallel with the prevailing wind. If this is not practical, use field fabricated wind
deflectors.
Service Access
Each end of the unit must be accessible after installation for periodic service. Compressors,
filter-driers, and liquid line solenoid valve are accessible from the end of the unit. Highpressure, low-pressure, and motor protector controls are on the compressor. Most
operating, equipment protection, and starting controls are located in the unit control box.
4 AGZ 010B through 034B IOMM AGZB1
The fan deck with the condenser fans and motors can be removed from the top of the unit.
4 Ft.
Clearance for Air Inlet
Clearance for Air Inlet
The recommended minimum side clearance between two units
The unit must not be installed in a pit or enclosure that is
deeper or taller than the height of the unit unless extra space
unit is 6 feet (1828mm) when installed in a pit. The pit cannot
Clearances
The flow of air to and from the
condenser coil must not be limited.
Restricting airflow or allowing air
recirculation will result in a decrease in
unit performance and efficiency. There
must be no obstruction above the unit
that would deflect discharge air
downward where it could be
recirculated back to the inlet of the
condenser coil. The condenser fans are
propeller type and will not operate with
ductwork on the fan outlet.
Install the unit with enough side
clearance for air entrance to the coil
and for servicing. Provide service access to
the evaporator, compressors, electrical
control panel and piping components as
shown in Figure 3. Do not block access to
the unit with piping or conduit.
Do not allow debris to accumulate near the
unit. Air movement may draw debris into
the condenser coil causing air starvation.
Give special consideration to low ambient
operation where snow can accumulate.
Keep condenser coils and fan discharge
free of snow or other obstructions to permit
adequate airflow.
Figure 3, Clearance requirements
4 Ft. (1220mm)
(1220mm)
Clearance for
Service Access
4 Ft. (1220mm)
is 8 feet (2440mm).
4 Ft.
(1220mm)
Clearance for
Service Access
Sound Isolation
The low sound levels of the AGZ chiller
are suitable for most applications. When
additional sound reduction is necessary,
locate the unit away from sound sensitive
areas. Avoid locations beneath windows or
between structures where normal operating
sounds may be objectionable. Reduce
structurally transmitted sound by isolating
water lines, electrical conduit and the unit
itself. Use wall sleeves and rubber isolated
piping hangers to reduce transmission of
water or pump noise into occupied spaces.
Use flexible electrical conduit to isolate
sound through electrical conduit. Spring
isolators are effective in reducing the low
amplitude sound generated by the Discus
semi-hermetic compressors and for unit
isolation in sound-sensitive areas.
is provided. The minimum clearance on each side of the
be deeper than the unit.
The minimum clearance to a side wall or building taller than
the unit height is 6 feet (1828mm) provided no solid wall
above 6 feet (1828mm) tall is closer than 12 feet (3658mm)
to the opposite side of the unit.
IOMM AGZB1 AGZ 010B through 034B 5
Vibration Isolators
Vibration isolators are recommended for all roof-mounted installations or wherever vibration
transmission is a consideration.
The unit should be initially placed on shims or blocks at the listed free height. When all
piping, wiring, flushing, charging, etc. is completed, the springs are adjusted upward to
loosen the blocks or shims that are then removed.
A rubber anti-skid pad is part of the isolator. Installation of spring isolators requires flexible
piping connections and at least three feet of flexible conduit to avoid straining the piping and
transmitting vibration and noise. These units cannot be bolted to isolators.
Table 1, Recommended Vibration Isolators
Neoprene-in-Shear
AGZ Model RF LF RB LB
010, 013, 017 RP-3 Red RP-3 Red RP-3 Red RP-3 Red 350014858
020, 025, 029, 034 RP-3 Green RP-3 Green RP-3 Red RP-3 Red 350014857
Spring
AGZ Mod el RF LF RB LB
010 CP 1-24 Brown CP 1-24 Brown CP 1-24 Brown CP 1-24 Brown 3500148 32
013, 017 CP 1-25 Red CP 1-25 Red CP 1-25 Red CP 1-25 Red 3500148 34
020, 025 CP1-26 Purple CP1-27 Orange CP 1-24 Brown CP 1-24 Brown 3500148 36
029 CP1-27 Orange CP1-2 7 Orange CP 1-25 Red CP 1-25 Red 3500148 38
034 CP1-27 Orange CP1 -2 8 Green CP 1-25 Red CP 1-25 Red 350014840
Note: See dimension drawing for location of isolators
Kit P/N
Kit P/N
Corner Weights
Packaged Chiller
AGZ-
010A
013A
017A
020A
025A
029A
034A
RF LF RB LB
BS
279 275 267 263
315 297 288 271
344 323 316 297
502 475 271 257
531 496 301 282
583 238 353 326
779 761 369 361
R BI
L BI
Control
Panel
R FI
L FI
Remote Evaporator
AGZ-
010A
013A
017A
020A 446 443 241 240
025A
029A
034A
LF RF LB RB
BM
257 264 236 243
290 286 246 243
312 309 266 263
453 449 245 243
488 487 296 295
656 703 297 318
CP-1, Spring Isolator RP-3 Neoprene-in-Shear Isolator
6 AGZ 010B through 034B IOMM AGZB1
Chilled Water System
Water Piping
Local authorities can supply the installer with the proper building and safety codes required
for proper installation.
Install piping with minimum bends and changes in elevation to minimize pressure drop.
Consider the following when installing water piping:
1. Vibration eliminators to reduce vibration and noise transmission to the building.
2. Shutoff valves to isolate the unit from the piping system during unit servicing.
3. Manual or automatic air vent valves at the high points of the system. Install drains at
the lowest points in the system.
4. Maintaining adequate system water pressure (expansion tank or regulating valve).
5. Temperature and pressure indicators located at the unit to aid in unit servicing.
Pressure gauge taps must be installed in the chilled water inlet and outlet piping or as
shown in Figure 4.
6. A strainer or other means of removing foreign matter from the water before it enters the
pump. Place the strainer far enough upstream to prevent cavitation at the pump inlet
(consult pump manufacturer for recommendations). The use of a strainer can prolong
pump life and keep system performance up.
7. A 40-mesh strainer is required in the water line just before the inlet of the evaporator.
This will help prevent foreign material from entering and decreasing the performance
of the evaporator.
!
CAUTION
If a separate disconnect is used for the 110V supply to the evaporator heating cable,
mark the disconnect clearly so the disconnect is not accidentally shut off during cold
seasons. Failure to do so can cause a failure of the evaporator.
8. The brazed plate evaporator has a thermostat and heating cable to prevent freeze-up
down to -20°F (-29°C). The heating cable should be wired to a separate 110V supply
circuit. As shipped from the factory, the heating cable is wired to the control circuit.
Protect all water piping to the unit from freezing.
9. If the unit is used as a replacement chiller on a previously existing piping system, flush
the system thoroughly before unit installation. Perform regular water analysis and
chemical water treatment on the evaporator immediately at equipment start-up.
10. When glycol is added to the water system for freeze protection, the refrigerant suction
pressure will be lower, cooling performance less, and water side pressure drop greater.
If the percentage of glycol is high, or if propylene is used instead of ethylene glycol, the
added pressure drop and loss of performance could be substantial. Reset the freezestat
and low leaving water alarm temperatures. The freezestat is factory set to default at
38°F (3.3°C). Reset the freezestat setting to approximately 4 to 5 degrees F (2.3 to 2.8
degrees C) below the leaving chilled water setpoint temperature. See the section titled
“Glycol Solutions” on page 10 for additional information concerning glycol.
11. Perform a preliminary leak check before insulating the piping and filling the system.
12. Include a vapor barrier on the piping insulation to prevent condensation and possible
damage to the building structure.
IOMM AGZB1 AGZ 010B through 034B 7
Figure 4, Typical Field Evaporator Water Piping
Air
Flow
Switch
Vibration
Eliminators
Drain
Isolation
Strainer
Vent
Inlet
P
Outlet
Valves
NOTES:
1. Chilled water piping within the unit enclosure must be insulated in the field.
2. Support piping independently of the unit and install per local codes.
System Volume
It is important to have adequate water volume in the system to provide an opportunity for
the chiller to sense a load change, adjust to the change and stabilize. As the expected load
change becomes more rapid, a greater water volume is needed. The system water volume is
the total amount of water in the evaporator, air handling products and associated piping. If
the water volume is too low, operational problems can occur, including rapid compressor
cycling, rapid loading and unloading of compressors, erratic refrigerant flow in the chiller,
improper motor cooling, shortened equipment life and other undesirable occurrences.
For normal comfort cooling applications, where the cooling load changes relatively slowly,
we recommend a minimum system volume of three to four times the flow rate (GPM). For
example, if the design chiller flow rate is 120 GPM, we recommend a minimum system
volume of 360 to 480 gallons.
Since there are many other factors that can influence performance, systems may
successfully operate below these suggestions. However, as the water volume decreases
below these suggestions, the possibility of problems increases.
Variable Chilled Water flow
Variable chilled water flow systems are not recommended for this class of equipment due to
limited unloading capability.
Flow Switch
Mount a water flow switch in the leaving water line to shut down the unit when water flow
is interrupted.
A flow switch is available from
McQuay (part number 017503300). It
is a “paddle” type switch and adaptable
to pipe sizes down to 1 1/4” (32mm)
nominal. Certain minimum flow rates
are required to close the switch and are
listed in Table 2. Install the switch as
shown in Figure 5. Connect the
normally open contacts of the flow
switch in the unit control center at
terminals 4 and 5. There is also a set of
normally closed contacts on the switch
that can be used for an indicator light or
an alarm to indicate when a “no-flow”
Figure 5, Flow Switch Installation
8 AGZ 010B through 034B IOMM AGZB1
condition exists. Freeze protect any flow switch that is installed outdoors. Follow
installation instructions provided with the flow switch. Calibrate the flow switch to open at
one-half of nominal flow rate.
NOTE: Differential pressure switches are not recommended for outdoor
installation. They are subject to damage from freezing.
Table 2, Flow Switch Settings
(NOTE !)
Min.
Adjst.
Max.
Adjst.
Flow
Flow Lpm 0.8 1.1 2.2 2.8 4.3 11.4 22.9 35.9 38.6
Flow
Flow Lpm 2.8 4.1 6.1 7.3 11.4 27.7 53.4 81.8 90.8
NOTES:
1. A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose.
2. Flow rates for a 2-inch paddle trimmed to fit the pipe.
3. Flow rates for a 3-inch paddle trimmed to fit the pipe.
4. Flow rates for a 3-inch paddle.
5. Flow rates for a 6-inch paddle.
inch 1 1/4 1 1/2 2 2 1/2 3 4 5 6 8 Pipe Size
mm 32 (2) 38 (2) 51 63 (3) 76 102 (4) 127 (4) 153 (4) 204 (5)
gpm 5.8 7.5 13.7 18.0 27.5 65.0 125.0 190.0 205.0
Lpm 1.3 1.7 3.1 4.1 6.2 14.8 28.4 43.2 46.6
gpm 3.7 5.0 9.5 12.5 19.0 50.0 101.0 158.0 170.0
No
gpm 13.3 19.2 29.0 34.5 53.0 128.0 245.0 375.0 415.0
Lpm 3.0 4.4 6.6 7.8 12.0 29.1 55.6 85.2 94.3
gpm 12.5 18.0 27.0 32.0 50.0 122.0 235.0 360.0 400.0
No
Water Connections
The unit has 3-inch holes for the chilled water piping to enter the unit. The connections are
made to the evaporator water connections located within the unit. Chilled water piping
within the unit must be insulated.
Refrigerant Charge
All units are designed for R-22 or R-407C and are shipped with an operating charge. The
operating charge for each unit is shown in the Physical Data Tables on pages 16 and 17.
Unit Component Location
Chilled Water
Inlet Connection
Chilled Water
Outlet Connection
Evaporator
Control Panel
Tandem Scroll
Compressors
Charging Valve
Solenoid Valve, Expansion Valve
Optional Hot Gas Bypass Valve Filter Drier
IOMM AGZB1 AGZ 010B through 034B 9
Glycol Solutions
The use of glycol antifreeze solutions will decrease unit capacity and increase the pressure
drop through the cooler. See Product Manual Catalog ACZAGZB1 for specific ratings and
correction factors.
!
CAUTION
Do not use automotive grade antifreeze. Industrial grade glycols must be used.
Automotive antifreeze contains inhibitors that will cause plating on the copper tubes within
the chiller evaporator. The type, storage, disposal, and handling of glycol used must be
consistent with local codes.
Evaporator Water Flow and Pressure Drop
Evaporator flow rate must fall between the minimum and maximum values shown in the
evaporator pressure drop curve, Figure 6. Flow rates outside of these limits result in a
chilled water Delta-T outside the operating range of the controller.
Measure the chilled water pressure drop through the evaporator at field-installed pressure
taps. It is important not to include the effect of valves or strainers in these readings.
Do not vary the chilled water flow through the evaporator while the compressors are
operating.
10 AGZ 010B through 034B IOMM AGZB1
Figure 6, Evaporator Water Pressure Drop Curves
AGZ 020
AGZ 025
AGZ 029
AGZ 034
AGZ 010
AGZ 017
AGZ 013
Minimum Flow Nominal Flow Maximum Flow
AGZ
Model
010
013
017
020
025
029
034
Flow Rate
gpm L/s ft. kPa gpm L/s ft. kPa gpm L/s ft. kPa
15.0 0.9 2.4 7.1 24.0 1.5 5.8 17.3 40.0 2.5 15.2 45.5
19.5 1.2 1.5 4.5 31.2 2.0 3.7 11.0 52.0 3.3 9.6 28.9
24.0 1.5 1.7 5.0 38.4 2.4 4.1 12.2 64.0 4.0 10.7 32.1
30.0 1.9 2.3 6.8 48.0 3.0 5.6 16.7 80.0 5.0 14.5 43.4
34.5 2.2 1.8 5.3 55.2 3.5 4.3 13.0 92.0 5.8 11.4 34.3
40.7 2.6 1.7 5.0 65.0 4.1 4.0 12.1 108.4 6.8 10.9 32.6
49.8 3.1 1.6 4.7 79.7 5.0 3.9 11.7 132.8 8.4 10.4 31.2
Pressure
Drop
Flow Rate
Pressure
Drop
Flow Rate
Pressure
Drop
IOMM AGZB1 AGZ 010B through 034B 11
R-407C Units
AGZ chillers are available with R-407C refrigerant as non-ARI certified units. R-407C is a
zeotropic blend of three compounds, and as such exhibits the characteristic of glide. It does not
behave as one substance like R-22 does. Glide is the difference (in degrees F) between the
beginning and end phase-change process in either the evaporator or condenser. During these
processes, different ratios of the refrigerant’s components change phase from the beginning to the
end of the process. The following functions, conditions and settings will differ from units
charged with R-22.
1. Different physical data and electrical data
2. Polyolester lubricants are used instead of mineral oil.
3. The saturated pressure/temperature relationship
4. Control and alarm settings
5. Charging procedures
1. Lubrication. The units are factory-charged with polyoester (POE) lubricant and one of the
following lubricants must be used if lubricant is to be added to the system:
POEs are very hygroscopic and will quickly absorb moisture if exposed to air. Pump the
lubricant into the unit through a closed transfer system. Avoid overcharging the unit.
Copeland Ultra 22 CC
Mobil EAL Arctic 22 CC
ICI EMKARATE RL RL 32CF
2. Pressure/temperature relationship. See Table 3 on page 13 for the saturated pressure-
temperature chart. Due to refrigerant glide, use the following procedures for superheat and
subcooling measurement.
To determine superheat, only vapor must be present at the point of measurement, no liquid.
Use the temperature reading, the pressure reading and the Saturated P/T Chart. If the
pressure is measured at 78 psig, the chart shows the saturated vapor temperature to be
50.6°F. If the temperature is measured at 60°F, the superheat is 9.4 degrees F.
To determine subcooling, only liquid must be present, no vapor. Use the temperature
reading, the pressure reading and the Saturated P/T Chart. If the pressure is measured at
250 psig, the chart shows the saturated liquid temperature to be 108.2°F. If the temperature
is measured at 98°F, the subcooling is 10.2 degrees F.
The P/T relationship between R-407C and R-22 is similar enough to allow the use of R-22
expansion valves. The valves may be marked as “R-22’ or “R-22/R-407C”.
3. Control and alarm settings. The software that controls the operation of the unit is factory-
set for operation with R-407C, taking into account that the pressure/temperature relationship
differs from R-22. The software functionality is the same for either refrigerant.
4. Charging procedure. The units are factory-charged with R-407C. Use the following
procedure if recharging in the field is necessary:
Whether topping off a charge or replacing the circuit’s entire charge, always remove the
refrigerant from the charging vessel as a liquid. Many of the cylinders for the newer
refrigerants have a dip tube so that liquid is drawn off when the cylinder is in the upright
position. Do not vapor charge out of a cylinder unless the entire contents will be charged
into the system.
With the system in a 250-micron or lower vacuum, liquid can be charged into the high side.
Initially charge about 80 percent of the system total charge.
12 AGZ 010B through 034B IOMM AGZB1
Start the system and observe operation. Use standard charging procedures (liquid only) to
top off the charge.
It may be necessary to add refrigerant through the compressor suction. Because the
refrigerant leaving the cylinder must be a liquid, exercise care to avoid damage to the
compressor. A sight glass can be connected between the charging hose and the compressor.
It can be adjusted to have liquid leave the cylinder and vapor enter the compressor.
Table 3, R-407C Pressure/Temperature Chart
Pressure
(PSIG)
20 -10.7 1.5 150 74.8 84.9
22 -8.2 4.0 155 76.8 86.8
24 -5.7 6.4 160 78.7 88.7
26 -3.4 8.7 165 80.6 90.5
28 -1.1 11.0 170 82.5 92.3
30 1.1 13.1 175 84.3 94.0
32 3.2 15.2 180 86.1 95.8
34 5.3 17.2 185 87.8 97.5
36 7.3 19.2 190 89.6 99.1
38 9.2 21.0 195 91.3 100.7
40 11.1 22.9 200 92.9 102.3
42 12.9 24.7 205 94.6 103.9
44 14.7 26.4 210 96.2 105.4
46 16.4 28.1 215 97.7 107.0
48 18.1 29.7 220 99.3 108.4
50 19.7 31.3 225 100.8 109.9
52 21.3 32.9 230 102.3 111.4
54 22.9 34.4 235 103.8 112.8
56 24.4 35.9 240 105.3 114.2
58 25.9 37.4 245 106.7 115.6
60 27.4 38.8 250 108.2 116.9
62 28.8 40.2 255 109.6 118.2
64 30.2 41.6 260 111.0 119.6
66 31.6 43.0 265 112.3 120.9
68 33.0 44.3 270 113.7 122.1
70 34.3 45.6 275 115.0 123.4
72 35.6 46.9 280 116.3 124.7
74 36.9 48.1 285 117.6 125.9
76 38.2 49.3 290 118.9 127.1
78 39.4 50.6 295 120.2 128.3
80 40.6 51.8 300 121.4 129.5
82 41.9 52.9 305 122.7 130.7
84 43.0 54.1 310 123.9 131.8
86 44.2 55.2 315 125.1 133.0
88 45.4 56.3 320 126.3 134.1
90 46.5 57.4 325 127.5 135.2
92 47.6 58.5 330 128.7 136.3
94 48.7 59.6 335 129.8 137.4
96 49.8 60.7 340 131.0 138.5
98 50.9 61.7 345 132.1 139.6
100 51.9 62.7 350 133.2 140.6
105 54.5 65.2 355 134.3 141.7
110 57.0 67.7 360 135.4 142.7
115 59.5 70.0 365 136.5 143.7
120 61.8 72.3 370 137.6 144.7
125 64.1 74.6 375 138.7 145.7
130 66.4 76.7 380 139.8 146.7
135 68.5 78.8 385 140.8 147.7
140 70.7 80.9 390 141.8 148.7
145 72.8 82.9 395 142.9 149.6
Liquid Temp
(°F)
Vapor Temp
(°F)
Pressure
(PSIG)
Liquid Temp
(°F)
Vapor Temp
(°F)
IOMM AGZB1 AGZ 010B through 034B 13
Control Layout and Operation
Control Center
All electrical controls are enclosed in a weatherproof control center with tool-locked, hinged
access doors. The left-hand section contains the microprocessor controller and control input and
output terminals. All high-voltage components are located on the right side of the panel.
ON/OFF Switch
MicroTech II
Controller
SpeedTrol Location
Field Connection
Terminals
Start-up and Shutdown
Pre Start-up
1. The chilled-water system should be flushed and cleaned. Proper water treatment is required
to prevent corrosion and organic growth.
2. Open all electric disconnects and check all electric connections for tightness.
3. Inspect all water piping for flow direction and correct connections at the evaporator.
4. Verify thermostat water temperature sensor is installed in the leaving water line (supply to
building). On all AGZ units the sensor well and sensor are factory mounted.
5. Check compressor oil level. The oil level should be visible in the oil sight glass.
6. Check voltage of the unit power supply and make certain voltage is within ±10% of
nameplate rating. Check unit power supply wiring for proper ampacity and a minimum
insulation temperature of 75°C. Check for proper phasing using a phase sequence meter.
7. Verify all mechanical and electrical inspections have been completed according to local
codes.
8. Open control stop switch S1(off). Turn on the main power and control disconnect switches.
This will energize crankcase heaters. Wait at least 24 hours before starting up unit.
9. Open all water flow valves and start the chilled water pump. Check all piping for leaks and
vent the air from the evaporator as well as from the system piping. Flush the evaporator and
system piping to obtain clean, noncorrosive water in the evaporator.
Control
Transformer
24-Volt Trans.
Non-Fused Disc.
or
Power Block
Fan
Contactors
Fan
Protection
Compressor Contactors
Start-up
1. Set temperature controller to the desired chilled water temperature. Set the chilled water
Delta-T.
14 AGZ 010B through 034B IOMM AGZB1
2. Start auxiliary equipment by turning on the following: time clock (if present), ambient
thermostat and/or remote on/off switch, chilled water pump.
3. If the controller calls for cooling, the unit will begin the start-up sequence.
4. After running the unit for a short time, check the oil level in the compressor (1/4 to 1/3
of the glass), rotation of fans, and flashing in refrigerant sight glass.
5. Verify superheat temperature is at the factory setting of 8 to 12 degrees F (4.4 to 6.7
degrees C).
6. After system performance has stabilized, complete the current AGZ Start-Up Form
(obtainable from the local McQuay sales office) to establish inception of warranty
benefits. Return the form to McQuay International through your sales representative.
Sequence of Operation
Start-Up
With the control circuit power on, 115V power is applied through the control circuit fuse F1
to the compressor crankcase heaters, the compressor motor protections and the primary of
the 24V control circuit transformer. The 24V transformer provides power to the
microprocessor controller.
When a remote time clock, manual switch, or the unit controller turns on the chilled water
pump, the flow switch closes and satisfies the flow requirement. If the chilled water
temperature is above the stage-on temperature, and all equipment protection devices are
closed, the unit will start. The controller will operate the unit in response to the leaving
chiller water temperature or reset signals that may be present.
Equipment Protection Alarms
The following conditions will shut down the unit and activate the alarm circuit:
• No evaporator water flow • Low evaporator pressure
• High condenser pressure • Motor protection system
• Phase voltage protection (Optional) • Outside ambient temperature
• Evaporator freeze protection • Sensor failures
The following alarms will limit unit operation:
• Condenser pressure stage down, unloads unit at high discharge pressures
• Low ambient lockout, shuts off unit at low ambient temperatures
• Low evaporator pressure hold, holds stage #1 until pressure rises
• Low evaporator pressure unload, shuts off stage #2
Unit Enable Selection
Enables unit operation from local keypad, digital input, or Building Automation System.
Unit Mode Selection
Selects standard cooling, ice, glycol, or test operation mode.
Condenser fan control
Control of condenser fans is provided by the MicroTech II controller. The control steps
condenser fans based on discharge pressure.
Shutdown
As the leaving water control is satisfied, it will stage off the lag compressor unloading the
unit. The second stage will de-energize the liquid line solenoid valve SV1 and shut off the
lead compressor. The compressor crankcase heaters will energize when the compressors
shut off, keeping the small amount of refrigerant in the plate heat exchanger from migrating
to the compressor. See page 56 for detailed explanation of compressor staging.
IOMM AGZB1 AGZ 010B through 034B 15
Physical Data
AGZ-BS, R-22/R-407C
Table 4, Physical Data, AGZ 010BS through 017BS, Packaged, R-22/R-407C
PHYSICAL DATA
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW) 10.0 (36.2) 13.7 (48.2) 15.8 (55.6)
Number Of Refrigerant Circuits 1 1 1
Unit Operating Charge, R-22 and R-407C, Lb. (kg) 22.0 (10.0) 24.0 (10.9) 31.0 (14.1)
Cabinet Dimensions, LxWxH, In. 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8
Cabinet Dimensions, LxWxH, (mm) (1869) x (1176) x (1289) (1869) x (1176) x (1289) (1869) x (1176) x (1289)
Unit Operating Weight, Lb. (kg) 1095 (498) 1190 (541) 1300 (591)
Unit Shipping Weight, Lb. (kg) 1085 (493) 1170 (532) 1280 (582)
Add'l Weight If Copper Finned Coils, Lb. (kg)
R-22 and [R-407C]
COMPRESSORS
Type Scroll Scroll Scroll
Nominal Horsepower 6.0 / 6.0 7.5 / 7.5 9.0 / 9.0
Oil Charge Per Compressor of a Tandem Set, oz. (g) 60 (1701) 85 (2410) 110 (3119)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DSPLACEMENT
Standard Staging 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, One of Two Sides, Sq. Ft. (M2) 30.3 (2.8) 30.3 (2.8) 30.3 (2.8)
Finned Height x Finned Length, In. 84 x 52 84 x 52 84 x 52
Finned Height x Finned Length, (mm) (2134) x (1321) (2134) x (1321) (2134) x (1321)
Fins Per Inch x Rows Deep: R-22 and [R-407C] 16 x 2 [16 x 2] 16 x 2 [16 x 2] 16 x 3 [16 x 3]
Pumpdown Capacity Lb. (kg) 35.3 (16.0) 35.3 (16.0) 52.9 (24.0)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 2 – 26 (660) 2 – 26 (660) 2 – 26 (660)
Number Of Motors - HP (kW) 2 – 1.0 (0.75) 2 – 1.0 (0.75) 2 – 1.0 (0.75)
Fan And Motor RPM, 60 Hz 1140 1140 1140
60 Hz Total Unit Airflow, CFM (l/s) 13950 (6584) 13950 (6584) 12000 (5664)
DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51)
Water Volume, Gallons (L) .94 (3.6) 1.66 (6.3) 2.00 (7.6)
Maximum Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103)
Maximum Water Pressure, psig (kPa) 350 (2413) 350 (2413) 350 (2413)
NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
010B 013B 017B
176 (80.0)
[176 (80.0)]
AGZ MODEL NUMBER
176 (80.0)
[176 (80.0)]
264 (120.0)
[264 (120.0)]
16 AGZ 010B through 034B IOMM AGZB1
Table 5, Physical Data, AGZ 020BS through 034BS, Packaged, R-22/R-407c
PHYSICAL DATA
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW) 20.6 (72.4) 22.7 (79.8) 27.7 (97.5) 34.0 (119.5)
Number Of Refrigerant Circuits 1 1 1 1
Unit Operating Charge, R-22 and [R-407C],
Lb. (kg)
Cabinet Dimensions, LxWxH, In. 106.2x 46.3 x 50.8 106.2x 46.3 x 50.8 106.2x 46.3 x 58.8 106.2x 46.3 x 58.8
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lbs. (kg) 1590 (723) 1635 (743) 1830 (832) 2315 (1052)
Unit Shipping Weight, Lbs. (kg) 1570 (714) 1610 (732) 1800 (818) 2270 (1032)
Add'l Weight If Copper Finned Coils, Lb. (kg)
R-22 and [R-407C]
COMPRESSORS
Type Scroll Scroll Scroll Scroll
Nominal Horsepower 12.0 / 12.0 13.0 / 13.0 15.0 / 15.0 20.0 / 20.0
Oil Charge Per Compressor of a Tandem Set,
oz. (g)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Standard Staging 0 –50 - 100 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, One of Two Sides, Sq. Ft. (M2) 49.0 (4.6) 49.0 (4.6) 58.3 (5.4) 58.3 (5.4)
Finned Height x Finned Length, In. 84 x 84 84 x 84 100 x 84 100 x 84
Finned Height x Finned Length, (mm) (2134) x (2134) (2134) x (2134) (2545 ) x (2134) (2545 ) x (2134)
Fins Per Inch x Rows Deep: R22 and [R407C]
Pumpdown Capacity, R-22 and [R-407C]
Lb. (kg)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660)
Number Of Motors - HP (kW) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75)
Fan And Motor RPM, 60 Hz 1140 1140 1140 1140
60 Hz Total Unit Airflow, CFM (l/s) 20925 (9877) 20925 (9877) 19800 (9346) 19800 (9346)
DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51) 2 (51)
Water Volume, Gallons (L) 2.16 (8.2) 3.05 (11.5) 4.00 (15.1) 5.55 (21.0)
Max. Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103)
Maximum Water Pressure, psig (kPa) 350 (2413) 350 (2413) 350 (2413) 350 (2413)
NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range.
020B 025B 029B 034B
34.0 (15.4)
[38.0 (17.3)]
(2697) x (1176) x
(1289)
284 (129)
[426 (194)]
110 (3119) 110 (3119) 110 (3119) 158 (4479)
16 x 2 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3]
56.9 (25.9)
[85.4 (38.8)]
AGZ MODEL NUMBER
42.0 (19.1) 47.0 (21.3) 50.0 (22.7)
(2697) x (1176) x
(1289)
426 (194)
[426 (194)]
85.4 (38.8) 101.6 (46.2) 101.6 (46.2)
(2697) x (1176) x
(1493)
508 (231)
[508 (231)]
(2697) x (1176) x
(1493)
508 (231)
[508 (231)]
IOMM AGZB1 AGZ 010B through 034B 17
AGZ-BM, R-22/R-407C
Table 6, Physical Data, AGZ 010BM through 017BM, Remote Evaporator, R-22/R-407C
PHYSICAL DATA
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW) 10.0 (36.2) 13.7 (48.2) 15.8 (55.6)
Number Of Refrigerant Circuits 1 1 1
Unit Operating Charge, R-22 and[R-407C, Lb. (kg) 13 (5.9) 14 (5.3) 17 (7.7)
Cabinet Dimensions, LxWxH, In. 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8 73.6 x 46.3 x 50.8
Cabinet Dimensions, LxWxH, (mm) (1869) x (1176) x (1289) (1869) x (1176) x (1289) (1869) x (1176) x (1289)
Unit Operating Weight, Lb. (kg) 950 (431) 1276 (579) 1278 (580)
Unit Shipping Weight, Lb. (kg) 1025 (465) 1350 (613) 1363 (619)
Add'l Weight If Copper Finned Coils, Lb. (kg)
R-22 and [R-407C]
COMPRESSORS
Type Scroll Scroll Scroll
Nominal Horsepower 6.0 / 6.0 7.5 / 7.5 9.0 / 9.0
Oil Charge Per Compressor of a Tandem Set, oz. (g) 60 (1701) 85 (2410) 110 (3119)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DSPLACEMENT
Standard Staging 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, One of Two Sides, Sq. Ft. (M2) 30.3 (2.8) 30.3 (2.8) 30.3 (2.8)
Finned Height x Finned Length, In. 84 x 52 84 x 52 84 x 52
Finned Height x Finned Length, (mm) (2134) x (1321) (2134) x (1321) (2134) x (1321)
Fins Per Inch x Rows Deep: R-22 and [R-407C] 16 x 2 [16 x 2] 16 x 2 [16 x 2] 16 x 3 [16 x 3]
Pumpdown Capacity Lb. (kg) 35.3 (16.0) 35.3 (16.0) 52.9 (24.0)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 2 – 26 (660) 2 – 26 (660) 2 – 26 (660)
Number Of Motors - HP (kW) 2 – 1.0 (0.75) 2 – 1.0 (0.75) 2 – 1.0 (0.75)
Fan And Motor RPM, 60 Hz 1140 1140 1140
60 Hz Total Unit Airflow, CFM (l/s) 13950 (6584) 13950 (6584) 12000 (5664)
REMOTE DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
Water Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51)
Water Volume, Gallons (L) .94 (3.6) 1.66 (6.3) 2.00 (7.6)
Liquid Line Conn. Braze, inches 1.125 1.125 1.125
Suction Line Conn. Braze, Inches 2.125 2.125 2.125
Temperature Sensor Conn. NPT, Inches 0.75 0.75 0.75
Dry Weight, lbs (kg) 50 (22) 75 (34) 87 (39)
Operating Weight, lbs (kg) 58 (26) 88 (40) 109 (49)
Maximum Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103)
Maximum Water Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103)
Vent and Drain Conn. Field Field Field
NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range and does not take field-installed lines into account.
010B 013B 017B
176 (80.0)
[176 (80.0)]
AGZ MODEL NUMBER
176 (80.0)
[176 (80.0)]
264 (120.0)
[264 (120.0)]
18 AGZ 010B through 034B IOMM AGZB1
Table 7, Physical Data, AGZ 020BM through 034BmS, Remote Evaporator, R-22/R-407c
PHYSICAL DATA
BASIC DATA
Unit Capacity @ ARI Conditions (1), Tons (kW) 20.6 (72.4) 22.7 (79.8) 27.7 (97.5) 34.0 (119.5)
Number Of Refrigerant Circuits 1 1 1 1
Unit Operating Charge, R-22 and [R-407C],
Lb. (kg)
Cabinet Dimensions, LxWxH, In. 106.2x 46.3 x 50.8 106.2x 46.3 x 50.8 106.2x 46.3 x 58.8 106.2x 46.3 x 58.8
Cabinet Dimensions, LxWxH, (mm)
Unit Operating Weight, Lbs. (kg) 1459 (662) 1478 (671) 1622 (737) 1817 (825)
Unit Shipping Weight, Lbs. (kg) 1558 (707) 1576 (716) 1719 (780) 1914 (869)
Add'l Weight If Copper Finned Coils, Lb. (kg)
R-22 and [R-407C]
COMPRESSORS
Type Scroll Scroll Scroll Scroll
Nominal Horsepower 12.0 / 12.0 13.0 / 13.0 15.0 / 15.0 20.0 / 20.0
Oil Charge Per Compressor of a Tandem Set,
oz. (g)
CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT
Standard Staging 0 –50 - 100 0 – 50 – 100 0 – 50 – 100 0 – 50 – 100
CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLING
Coil Face Area, One of Two Sides, Sq. Ft. (M2) 49.0 (4.6) 49.0 (4.6) 58.3 (5.4) 58.3 (5.4)
Finned Height x Finned Length, In. 84 x 84 84 x 84 100 x 84 100 x 84
Finned Height x Finned Length, (mm) (2134) x (2134) (2134) x (2134) (2545 ) x (2134) (2545 ) x (2134)
Fins Per Inch x Rows Deep: R22 and [R407C]
Pumpdown Capacity, R-22 and [R-407C]
Lb. (kg)
CONDENSER FANS - DIRECT DRIVE PROPELLER TYPE
Number Of Fans - Fan Diameter, In. (mm) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660) 3 – 26 (660)
Number Of Motors - HP (kW) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75) 3 – 1.0 (0.75)
Fan And Motor RPM, 60 Hz 1140 1140 1140 1140
60 Hz Total Unit Airflow, CFM (l/s) 20925 (9877) 20925 (9877) 19800 (9346) 19800 (9346)
REMOTE DIRECT EXPANSION EVAPORATOR - BRAZED PLATE-TO-PLATE
Connection Size Victaulic, In. (mm) 2 (51) 2 (51) 2 (51) 2 (51)
Water Volume, Gallons (L) 2.16 (8.2) 3.05 (11.5) 4.00 (15.1) 5.55 (21.0)
Liquid Line Conn. Braze, inches 1.125 1.125 1.375 1.375
Suction Line Conn. Braze, Inches 2.125 2.125 2.125 2.125
Temperature Sensor Conn. NPT, Inches 0.75 0.75 0.75 0.75
Dry Weight, lbs (kg) 92 (42) 124 (56) 156 (71) 211 (96)
Operating Weight, lbs (kg) 110 (50) 148 (67) 188 (85) 255 (116)
Max. Refrigerant Working Pressure, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103)
Maximum Water Pressure, psig (kPa) 350 (2413) 350 (2413) 350 (2413) 350 (2413)
Drain and Vent Connections Field Field Field Field
NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range and does not take field-installed lines into account.
020B 025B 029B 034B
34.0 (15.4)
[38.0 (17.3)]
(2697) x (1176) x
(1289)
284 (129)
[426 (194)]
110 (3119) 110 (3119) 110 (3119) 158 (4479)
16 x 2 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3] 16 x 3 [16 x 3]
56.9 (25.9)
[85.4 (38.8)]
AGZ MODEL NUMBER
42.0 (19.1) 47.0 (21.3) 50.0 (22.7)
(2697) x (1176) x
(1289)
426 (194)
[426 (194)]
85.4 (38.8) 101.6 (46.2) 101.6 (46.2)
(2697) x (1176) x
(1493)
508 (231)
[508 (231)]
(2697) x (1176) x
(1493)
508 (231)
[508 (231)]
IOMM AGZB1 AGZ 010B through 034B 19
Electrical Data
Field Wiring
Wiring must comply with all applicable codes and ordinances. Warranty is void if wiring is
not in accordance with specifications. Copper wire is required for all power lead
terminations at the unit.
AGZ 010A through AGZ 034A units have single point power connection. A single field
supplied fused disconnect is required. The control transformer is factory mounted.
If the evaporator heater is on a separate disconnect switch from the main unit power supply,
the unit may be shut down without defeating the freeze protection provided by the
evaporator heater.
R-22 data is located on pages 21 through 22, R-407C data in on pages 23 through 24.
R-22
Table 8, Electrical Data Single Point, R-22
AGZ
Unit
Size
010B
013B
017B
020B
025B
029B
034B
See "Electrical Notes" on page 26.
Volts
208 56 3 6 AWG 1 1.00 (25)
230 54 3 6 AWG 1 1.00 (25)
460 26 3 10 AWG
575 22 3 10 AWG
208 77 3 4 AWG 1 1.00 (25)
230 77 3 4 AWG 1 1.00 (25)
460 39 3 8 AWG 1 1.00 (25)
575 30 3 10 AWG
208 82 3 4 AWG 1 1.00 (25)
230 80 3 4 AWG 1 1.00 (25)
460 41 3 8 AWG 1 1.00 (25)
575 33 3 10 AWG
208 113 3 2 AWG 1 1.25 (32)
230 113 3 2 AWG 1 1.25 (32)
460 50 3 8 AWG 1 1.00 (25)
575 42 3 8 AWG 1 1.00 (25)
208 126 3 1 AWG 1 1.25 (32)
230 126 3 1 AWG 1 1.25 (32)
460 58 3 6 AWG 1 1.00 (25)
575 50 3 8 AWG 1 1.00 (25)
208 138 3 1/0 AWG
230 138 3 1/0 AWG
460 69 3 4 AWG 1 1.00 (25)
575 57 3 6 AWG 1 1.00 (25)
208 182 3 3/0 AWG
230 182 3 3/0 AWG
460 78 3 4 AWG 1 1.00 (25)
575 63 3 6 AWG 1 1.00 (25)
Minimum
Circuit
Ampacity
(MCA)
Field Wire
Quantity
Power Supply
Wire
Gauge
75C
Quantity
Hub (Conduit
Connection)
Nominal
Size
In. (mm)
1 1.00 (25)
1 1.00 (25)
1 1.00 (25)
1 1.00 (25)
1 1.50 (38)
1 1.50 (38)
1 2.00 (51)
1 2.00 (51)
Field Fuse
or Breaker Size
Recommended Maximum
70 70
60 70
30 30
25 25
90 100
90 100
45 50
35 40
110 110
90 100
50 50
40 40
125 150
125 150
60 60
50 50
150 150
150 150
70 70
60 60
175 175
175 175
80 90
70 70
250 250
250 250
90 100
70 80
20 AGZ 010B through 034B IOMM AGZB1
Table 9, Compressor and Condenser Fan Motor Amp Draw, R-22
AGZ
Unit
Size
010B
013B
017B
020B
025B
029B
034B
Volts
208 19.4 19.4 5.8 2 21.4 156 156
230 18.6 18.6 5.8 2 23.7 156 156
460 9.0 9.0 2.8 2 10.7 75 75
575 7.4 7.4 2.5 2 11.0 54 54
208 28.8 28.8 5.8 2 21.4 195 195
230 28.8 28.8 5.8 2 23.7 195 195
460 14.7 14.7 2.8 2 10.7 95 95
575 10.8 10.8 2.5 2 11.0 80 80
208 31.2 31.2 5.8 2 21.4 225 225
230 30.1 30.1 5.8 2 23.7 225 225
460 15.5 15.5 2.8 2 10.7 114 114
575 12.1 12.1 2.5 2 11.0 80 80
208 42.3 42.3 5.8 3 21.4 245 245
230 42.3 42.3 5.8 3 23.7 245 245
460 18.2 18.2 2.8 3 10.7 125 125
575 14.9 14.9 2.5 3 11.0 100 100
208 48.1 48.1 5.8 3 21.4 300 300
230 48.1 48.1 5.8 3 23.7 300 300
460 21.8 21.8 2.8 3 10.7 150 150
575 18.6 18.6 2.5 3 11.0 109 109
208 53.2 53.2 5.8 3 21.4 340 340
230 53.2 53.2 5.8 3 23.7 340 340
460 26.5 26.5 2.8 3 10.7 173 173
575 21.7 21.7 2.5 3 11.0 132 132
208 73.1 73.1 5.8 3 21.4 505 505
230 73.1 73.1 5.8 3 23.7 505 505
460 30.5 30.5 2.8 3 10.7 225 225
575 24.4 24.4 2.5 3 11.0 180 180
See "Electrical Notes" on page 26.
Rated Load Amps Locked Rotor Amps
Compressors Compressors
No. 1 No. 2
Fan
Motor
(Each)
No. of
Fans
Fan
Motor
(Each)
Across-The-Line
No. 1 No. 2
IOMM AGZB1 AGZ 010B through 034B 21
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